element x is a neutral element and has 39 protons. what element is it and how many electrons does it have? (use the periodic table)

Consider a species in which dark brown fur is dominant relative to light brown fur.

In the future, clean energy sources, such as solar power, may be used to create hydrogen fuel. a. True b. False

Which of these is true about the scientific method? A. Conclusions are made at the beginning of the scientific method B. Questions need to be stated at the beginning of the scientific method C. It is not important to form a hypothesis D.

The reaction 4 a + c + h → d has the mechanism below. what is the rate law? 1) 2 a → b fast 2) 2 b → b2 fast 3) b2 + c → g slow 4) g + h → d fast a. rate = k[a]2[c] b. rate = k[a]4[h][c] c. rate = k[a]2 d. rate = k[b]2[c] e. rate = k[a]4[c]

Reaction A: 4HCl (g) + O2 (g) ⇄ 2Cl2 (g) + 2H2O (g) Reaction B: N2O4 (g) ⇄ 2NO2 (g) Reaction C: H2 (g) + I2 (g) ⇄ 2 HI Reaction D: 2NH3 (g) ⇄ N2 (g) + 3H2 (g) The reactions represented above are carried out in sealed, rigid containers and allow to

What does the chemical formula C3H2O, tell about a molecule of the compound it represents?

No two different elements will have the atomic number.-

Which two scenarios illustrate the relationship between pressure and volume as described by Boyle's law? 1. The pressure in a closed bottle decreases when the bottle is squeezed. 2.

0.210 mol of octane is allowed to react with 0.760 mol of oxygen. which is the limiting reactant?

The national drug code number (NDC) of the drug is included in this section of a drug monograph